alidade
English
A firefighting alidade
Alternative forms
- alhidade, alhidad, alidad (all obsolete)
Etymology
From French alidade, from Spanish alidada, from Arabic عِضَادة, perhaps from عضد "upper arm".
Pronunciation
- IPA: /ˈælɪdeɪd/
Noun
alidade (plural alidades)
- (cartography, astronomy, surveying) A sighting device used for measuring angles.
Synonyms
- turning board, diopter (obsolete)
Translations
measuring apparatus
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